The Collaborative International Dictionary of English v.0.48:

Solen \So"len\, n. [NL., fr. Gr. ??? channel, a shellfish.]
   1. (Med.) A cradle, as for a broken limb. See Cradle, 6.
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   2. (Zool.) Any marine bivalve mollusk belonging to Solen or
      allied genera of the family Solenidae; a razor shell.
      [1913 Webster]